1974 Bronco
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? Some body welded these brackets not sure if they are correct. If not how is this going to effect the geometry.
Radius arm Brackets
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OP
OP
1974 Bronco
New member
By the way they are 4 5/8 from bottom of frame to center of hole
Seabronc
New member
From the look of it those are not in the original position. Does the truck have a suspension lift? Take a look at this diagram http://www.lmctruck.com/icatalog/fbr/full.aspx?Page=66
Have fun with that.
>-
Have fun with that.
>-
OP
OP
1974 Bronco
New member
Thanks for the sight. I really don't know I can only assume the blocks welded to the frame are 2 1/2 inches the tires were P78-15 buckshot wide mudders with O.D. of 32.7 has fender flares the coil springs with out load were 18" but looked like stock leaf springs
OP
OP
1974 Bronco
New member
Thanks for the site. Not sure I can only assume the welded blocks are 2 1/2" the tires that were on it were p78-15LT buckshot wide mudders. With an O.D. of 32.7. Also had fender flares and 18" coil springs not sure if this will help.
Yep.., there's some custom work done there.
They're in the stock location however, the stock distance frame to hole is 2.25"
Someone put that piece of channel in for support after lowering the attach point.
This was all done instead of buying 'new" radius arm drop brackets.
The reason for this is to re-set the caster back to spec. due to a tall lift.
This would work fine if you have, or intend on doing a big lift.
They're in the stock location however, the stock distance frame to hole is 2.25"
Someone put that piece of channel in for support after lowering the attach point.
This was all done instead of buying 'new" radius arm drop brackets.
The reason for this is to re-set the caster back to spec. due to a tall lift.
This would work fine if you have, or intend on doing a big lift.
OP
OP
1974 Bronco
New member
if I went to a 2.5 lift would that work? or would I be better off cutting them off.
My old "stock" coils are approx. 17.5" to 18" as well., & they're Not "progressive" whick makes me wonder
why your PO did this mod..?
"if I went to a 2.5 lift would that work? or would I be better off cutting them off."
This is a "gray area".., even starting from stock.
My stock to 2.5" lift required 7deg. C-bushings to get the caster right. (it called for 4deg.)
I had to do the front twice.
Same for the rear. I had to use "wedges" on the spring perches to eliminate vibration.
(i.e. dr. shaft angle correction)
Point being it seems no two veh. are the same.
Best guess is you could use them (they look strong enough) .., if it doesn't handle
to your satisfaction, you could remove them or go to a smaller C-bushing.
HTH
B
P.S. there are new radius arm hangar brackets, on the market, that are adjustable.
(I think 3 positions)
why your PO did this mod..?
"if I went to a 2.5 lift would that work? or would I be better off cutting them off."
This is a "gray area".., even starting from stock.
My stock to 2.5" lift required 7deg. C-bushings to get the caster right. (it called for 4deg.)
I had to do the front twice.
Same for the rear. I had to use "wedges" on the spring perches to eliminate vibration.
(i.e. dr. shaft angle correction)
Point being it seems no two veh. are the same.
Best guess is you could use them (they look strong enough) .., if it doesn't handle
to your satisfaction, you could remove them or go to a smaller C-bushing.
HTH
B
P.S. there are new radius arm hangar brackets, on the market, that are adjustable.
(I think 3 positions)
Last edited by a moderator:
OP
OP
1974 Bronco
New member
Thanks again guys your help got me started in the right direction. After extensive measuring I have found it is a 2.5" lift with a 2 deg c- bushing to keep the caster correct with these brackets
That's interesting..!!
After reviewing your pics., they lead me to believe this is a "way back when" homemade lift using stock coil springs.
That's fine it seems to have worked. Curious how he got there.? Is there a spacer between the lower coil spring
cup & the top of the radius arm..? (stock, the cup sits right on the radius arm)
On the rear.., were/are the back spring shackles reversed...? Meaning the pivot pointing down, not up as in stock.
This is how they got the lift in the old days, using stock leaf springs.
Point being.., this is a good decision time. You may want to go with an engineered lift with progressive coils
& 11pak rear leafs. This will give great articulation & a great ride. (Obvious cut-n-weld involved.)
In any case, keep us posted.., pics-n-notes.
And, welcome to the site
B
After reviewing your pics., they lead me to believe this is a "way back when" homemade lift using stock coil springs.
That's fine it seems to have worked. Curious how he got there.? Is there a spacer between the lower coil spring
cup & the top of the radius arm..? (stock, the cup sits right on the radius arm)
On the rear.., were/are the back spring shackles reversed...? Meaning the pivot pointing down, not up as in stock.
This is how they got the lift in the old days, using stock leaf springs.
Point being.., this is a good decision time. You may want to go with an engineered lift with progressive coils
& 11pak rear leafs. This will give great articulation & a great ride. (Obvious cut-n-weld involved.)
In any case, keep us posted.., pics-n-notes.
And, welcome to the site
B
OP
OP
1974 Bronco
New member
The only thing I can figure out is the PO needed more caster with his 2.5 lift and added the blocks. No the back springs shackles were not inverted and there was no spacer under the front coil spring cup. Best I can do is go back with a 2.5 lift and play my cards were they fall!
PS Thanks
PS Thanks
Hmmm.,
Still can't figure how he got the lift, however, in the pic it looks lifted..?
My "stock" 5pak leaf springs, resting on the bench on the eylets, stands right at 10 1/4 inches.
You might measure yours. Also maybe there's "add-a-leafs" (stiff ride)
(this would account for a rear lift)
My stock front coils are 18" at rest & so are yours....??
"Best I can do is go back with a 2.5 lift and play my cards were they fall!"
Does this mean you're going to use what's there..?
Looks like you're doing a complete resto. I'd be curious how he got that 2.5 inch rise
B/4 putting it back together.
Just say'n
B
P.S. It dawned on me, he likely altered the rad. arm attach points so that he didn't have
to take the front end appart to change the 2deg. (stock) C-bushings to 4 deg.
Still baffling what created the actual 2.5 inch lift...??
Still can't figure how he got the lift, however, in the pic it looks lifted..?
My "stock" 5pak leaf springs, resting on the bench on the eylets, stands right at 10 1/4 inches.
You might measure yours. Also maybe there's "add-a-leafs" (stiff ride)
(this would account for a rear lift)
My stock front coils are 18" at rest & so are yours....??
"Best I can do is go back with a 2.5 lift and play my cards were they fall!"
Does this mean you're going to use what's there..?
Looks like you're doing a complete resto. I'd be curious how he got that 2.5 inch rise
B/4 putting it back together.
Just say'n
B
P.S. It dawned on me, he likely altered the rad. arm attach points so that he didn't have
to take the front end appart to change the 2deg. (stock) C-bushings to 4 deg.
Still baffling what created the actual 2.5 inch lift...??
Last edited by a moderator:
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